| 摘要 |
<p>Nanocrystalline zinc oxide with a Brunauer-Emmet-Teller surface area of greater than 45 m 2>/g and a secondary crystallite size of 20-100 nm, is claimed. Independent claims are also included for: (1) a supported zinc oxide comprising the nanocrystalline zinc oxide, where the support contains a material comprising silicon dioxide, zirconium dioxide, bentonite, montmorillonite, aluminum oxide, titanium dioxide, copper oxide, magnesium silicate and/or aluminosilicates; and (2) preparing the nanocrystalline zinc oxide, comprising: (a) introducing a zinc starting material in the form of an aqueous solution, slurry or suspension in a reaction chamber using a carrier fluid; (b) heat treating the zinc starting material in a treatment zone of the reaction chamber using a pulsating flow at a temperature of 200-650[deg] C; (c) forming the nanocrystalline zinc oxide material; and (d) discharging the nanocrystalline zinc oxide material obtained in the step (b) and (c) from the reactor.</p> |
